System using induced current for contactless testing of wiring networks
CA 2102880 C · Owner: International Business Machines Corporation · Inventors: Golladay, Steven D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for measuring electrical characteristics of an electrical device having a conductive structure associated therewith involves the sequence of steps as follows: First, employ a low energy electron beam to charge all conductors on the surface of the device. Expose individual conductors to a focussed low energy electron beam serially. Make measurements of an induced current signal when individual conductors are exposed to the focussed electron beam. Analyze induced current measurements derived from the individual conductors. Then determine electrical characteristics of the device based on the analysis. A charge storage method and three capacitive test methods for defect detection and …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 10, 1993 and granted November 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.